A galvanometer whose resistance is 120 Ω gives full scale deflection with a current of 0.05 A so that it can read a maximum current of 10 A. A shunt resistance is added in parallel with it. The resistance of the ammeter so formed is
|
(a) 0.06 Ω |
(b) 0.006 Ω |
(c) 0.6 Ω |
(d) 6 Ω s |
(c) 0.6 Ω
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A wire of resistor R is bent into a circular ring of radius r. Equivalent resistance between two points X and Y on its circumference, when angle XOY is a, can be given by
|
(a) |
(b) |
(c) R (2 p – a) |
(d) |
Myopia is due to
|
(a) Elongation of eye ball |
(b) Irregular change in focal length |
|
(c) Shortening of eye ball |
(d) Older age |
The refractive indices of glass and water w.r.t. air are 3/2 and 4/3 respectively. The refractive index of glass w.r.t. water will be
|
(a) 8/9 |
(b) 9/8 |
(c) 7/6 |
(d) None of these |
The combination of the gates shown in the figure below produces
|
(a) NOR gate |
(b) OR gate |
(c) AND gate |
(d) XOR gate |
